Indicator-lock



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INDICATOR LOCK.

No. 428,711. Patented May 27, 1890.

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J. C. BARR..

INDICATOR LOOK.

No. 428,711. Patented May 27, 1890.

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No. 428,711. Patented Mey Z7, 1890.

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JOHN O. BARR, OF ST. PAUL, MINNESOTA.

INDICATOR-LOCK.

SPECIFICATION forming part of Lettersratent No. 428,711, dated May 27,1890- Application filed May 2, 1889. Serial Ne. 308,959. (No model.)

T0 all whom it may concern.-

Be it known that I, JOHN O. BARR, of St. Paul, in the county of Ramsey,State of Minnesota, have invented certain new Improvements in Locks, ofwhich the following is a specification.

This invention relates, generally, to improvements in locks, and moreespecially to that class of locks which is provided with devices forindicating that they have been unauthorizedly opened.

The invention consists, generally, in the construction and combinationhereinafter described, and particularly pointed out in the claims.

The objects of the invention are, first, to provide a padlock with animproved shackle which cannot be tilted backward until after a slidingbolt to which itis secured is released, permitting the pivoted end ofthe shackle to be drawn out and released from a socket in which it isheld when the shackle is fastened; second, to provide an improvedlocking mechanism for fastening the shackle, and, third, to constructapadlock that willbe water-proof, thus permitting it to be used inexposed places with full protection to the mechanism of the lock.

In the accompanying' drawings, forming part of this specicatioInFigure-lrepresents a front or face view of Iny improved lock. Fig. 2 is aperspective view of the key. FIg. 3 is a face view with the face-plateand the indicating-disks removed. Fig. 4 is a side elevation and sectionon line a; of Fig. 3, with a portion of the lockecasin g removed to showthe indicating mechanism. Fig. 5 is a front view with the front plateand indicating mechanism removed. Fig. 6 is a similar view, with the keyinserted in the lock and the shackle unfastened and raised. Fig. 7 is acentral vertical section on line x :r of Fig. 4t. Fig. 8 is a verticalsection on line fz/ y of 'Fig'. 5. Fig. 9 is a detail of vthe indicatingmechanism. Fig. 10 is a bottom view of the lock casing, showing thekey-hole. Fig. 11 is atop view of the loclecasing with the shackleremoved and showing the sockets which receive the ends of the shackle.

In the drawings, 1 represents the lock-casing, which may be of anydesired shape and construction, and is provided in its face-plate 4twith two slots or openings 3, that are preferably covered with glass,mica, or other transparent material 5. The shackle 2 is of substantiallythe usual form, and is provided at its free end with a reduced portionor tenon (i, which fits into the socket 7 in the lock-casing. Thissocket is preferably of suitable size to form a close iit with the freeend of the shackle, and the socket preferably does not communicate withthe interior of the lockcasing. The other end of the shackle is providedwith a tenen 8,which fits into a socket 9 in the lock-casing. Thissocket communi cates with the interior of the casing. The upper end ofthis socket preferably iiares out ward, and the shackle is provided witha collar 10, which makes a water-tight tit with the end of the socket,whereby when the shackle is fastened water is precluded from enteringthe socket. The tenon S is pivotally secured to the sh ackle-boltll-fthat is, arranged within the interior of the lock-casing. This boltis adapted to slide upward into the socket El, being guided by a pin12,which passes through a slot 13 in the bolt. Vhen the bolt is in itselevated position, the pivotal point between the shackle and the bolt 11is above the top of the socket 9, and the shackle may be tilted backwardand its free end carried out of the socket 7. When the shackle-bolt iscarried downward into the casing and the pivotal ypoint between the boltand shackle is brought inside of the socket 9, the shackle cannot beturned upon its pivot. The bolt 11 is provided with a beveled notch 15,and a sliding bolt 14, having a beveled end, is arranged within thelock-easing and is adapted to engage said beveled notch 15 and fastenthe shackle bolt 11 with the ends of the shackle'in engagement with thesockets 7 and 9. A spring 1G engages the bolt 14 and tends to hold it atall times in engagement with the shackle-boltll. The rear end of thebolt 14 is provided With a projection 17, extending at right angles tothe main portion of the bolt. A cam 18 is mounted upon a pivot 19, andis arranged t-o engage the projecting portion 17 of the bolt 14. Vhenthe short-er radius of the cam 1S is against the projection 17, the

rbolt 14 may engage the notch in the block 11.

By turning the cam 1S upon its axis and bringing its ion ger radiusagainst the projec- IOO tion. 17 the bolt will he moved back against thetension ol the spring le and withdraws from the notch l5.

I prefer to employ a key 20, of substantially the form shown in Fig. 2.This key consists, preferably, ot a strip ol' angle-iron or other metalhavin g a series ot' notches formed 1n one edge thereof. A key-hole 2l,of substantially the form ot the cross-section of the key, is arrangedpreferably in the lower part of the lock-casing. A pivoted stop 23 isarranged within the easing and closes the keyhole when the key isremoved. A spring 25 1s connected with this stop and holds it normallyinposition to close the key-hole. A dogr is secu red to or formedintegrally with the stop 23. This dog comes under the cam 1S when thecam is in its normal position, as shown in Fig. '7, and forms a stoptherefor and prevents turning the cam upon its axis unt-il the dog` 2Thas been moved out ot` the path of the cam, which is done by theinsertion et" the key. A plate 2S is secured to or formed integrallywith the cam 1S, and it has a curved edge, which is made in the are of acircle of which the pivot 19 is the center. This plate is provided uponits edge with a series of notches, which are preferablyot various sizes,thus forming upon the edge of the plate a series of teeth of variouswidths, but all of the same length. The key is likewise provided with aseries of notches of various widths, which correspond with the teethupon the edge of the plate. The plate thus forms a segmental gear andthe key a rack-bar, which engages therewith. As the key is inserted, itirst strikes thepivoted stop 23, pushing it away from the key-hole andmoving the dog 2T from under the cam IS. As the key is advanced, theteeth thereon engage the notched plate, turning it upon its axis, andthereby turning the cam 1S and retracting the bolt 14. Yhen the platehas been turned, so that the last tooth upon the plate engages the lastnotch upon the key, the bolt li will be withdrawn from engagement withthe notch l5. The shackle-bolt ll andthe shackle may then be drawn outinto the position shown in Fig. (3, and the shackle may then be turnedback upon its pivot and the lock removed. lYhen the key is drawn out ofthe lock, the segmental wheel will return to its former position,returning the cam to its former position, and the spring may then throwthe bolt It into engagement with the notch in the shackle-bolt as soonas the shackle-bolt is returned to position to bring the notch oppositethe end of the locking-bolt. lYhen the key is withdrawn, the dog 27 andthe keyhole stop 23 are returned to position by means of the spring 25,In order to guide the key as it is inserted into the lock, l provide aguide-plate 34, which extends 'from the keyhole across the interior otthe lock-casing. This guide-plate is of angular shape in crosssection,so that the outer angle ot the keytlts against the plate. The distancefrom the pivot ot the segmental gear to the guide-plate 34- is equal tothe radius of the segmental gear, so that as this gear is turned uponits axis the ends ot' the teeth come close to the guide-plate. Thisrenders it impossible to turn the gear, except by the use ol' a key ot'the kind described having' notches corresponding to the teeth upon thesegmental gear.

The only openings to the interior of the lock-casing are the socket 9and thekey-hole l. The socket 9, as 'before stated. is closed by thecollar lO, which makes a water-tight joint with the end of the socket.The keyhole is also completely closed by the stop It will thus be seenthat the lock-casing is completely water-proof and theinclosed meehanismis fully protected.

I prefer to provide an indicatingmechanism in connection with this lock,and this meehanism is preferably composed of a series ofindicating-disks 30, as shown in Fig. i). The operating-pawl 3l of theindicating mechanism is secured upon the sliding shackle-bolt ll,preferably by means of a pin 32 and plate 353, so that at each movementol the shacklebolt the indicating mechanism is Operated and thecombination ot' figures and letters is changed each time the lock isuntastened, and it will be impossible to know what combination will beshown until thelock is unfastened and the shackle withdrawn.

It will be understood that by changing the size and arrangement of theteeth upon the key and upon the segmental gear-wheel a large number ofcombinations can be made, and it will be necessary to use the key havingthe corresponding arrangement ot teeth to operate any one of the lot.

The key may be made ot any desired width and height and the angles mayextend in any direction, either toward the t'ront or the back of thelock or toward either side, and the notches upon the key may be madeupon either edge thereol'.

I claim as my invention* l. In a lock, the combination, with alocking-bolt and a cam engaging therewith, ot a gear connected with saidcam, and a sliding key provided with a series of teeth corresponding' tothe teeth upon said gear.

In a lock, mechanism for operating a bolt comprising in combination agear provided upon its edge with a series ot irregularlyspaced teeth ot'various widths, and a sliding key provided with a corresponding seriesof teeth adapted to engage the teeth upon said gear, whereby as the keyis inserted into the lock with the sliding motion said gear is turnedupon its axis.

3. In a lock, the combination, with a sliding' bolt, of a gear having acam connected with said bolt and provided with a series of teeth, aguide-plate forming the back et the keyway, and a sliding' key providedwith a corresponding serics of teeth arranged to engage the teeth uponsaid gear, whereby as said key is inserted into the lock with a sliding'motion IOO ITO

said gear is turned upon its axis and said bolt is moved.

et. In a lock, the combination, with a sliding bolt, of a pivoted camengaging therewith and adapted as it is turned upon its axis to movesaid bolt, a gear connecting with 'said cam, a pivoted dog forming astop for said cam, and a sliding key provided With a series of teethadapted to engage the teeth upon said gear, whereby as said key isinserted into the lock said dog is first moved out ot" the path of saidcaln and said gear is then turned upon its axis, substantially asdescribed.

5. In a lock, the combination, With a sliding shackle-bolt and a shacklepivoted to said bolt, of a locking-bolt arranged to engage and lock saidshackle-bolt, a gear provided With a suitable cam arranged to engagesaid lockingbolt, and a sliding key provided with a series of teethcorresponding With the teeth upon said gear, substantially as described.l

6. In a lock, the combination of the easing provided with the socket oropening` 9, the shackle-bolt ll, arranged within said casing, theshackle pivoted to said bolt at a point which is Within said socket whenthe lock is fastened and outside of said socket when the lock isunfastened, the locking-bolt arranged to engage said sliding bolt ll, agear provided with a suitable cam arranged to move said sliding bolt asthe gear is turned upon its axis, a guide-plate forlnin g the back ofthe key- Way, and a sliding gear provided with a series ot teethcorresponding With the teeth upon said gear, substantially as described.

7. In a lock, the combination, with a suitable casing provided with acircular opening or socket 9, having a beveled mouth or end, of theshackle-bolt 1l, arranged within said casing, having a 4slot 13,engaging a stop-pin 12, and the shackle 2, pivoted to said bolt andhaving a collar l0, adapted to make a tight lit with the bevel of saidsocket, substantially as described.

8. In a lock, the combination, With a locking-bolt and a cam arranged toengage said bolt, of a gear connected with said cani, a guide-platearranged Within said casing at a distance from the center of said gearequal to the radius of said gear, and a sliding key u provided with aseries of teeth corresponding with the teeth upon said gear. y

9. In a lock, the combination, with a casing provided with an opening orsocket in its Wall, of a shackle, a shackle-bolt having a pivotalconnection with said shackle and adapted to be moved so as to bring saidpivotal connection outside of said casing or Within said socket, anindicating mechanism connected with said shackle-bolt, a locking-boltadapted to engage said shackle-bolt, and a cam engaging saidlocking-bolt, substantially as described.

In testimony whereof I have hereunto set my hand this 15th day of April,1889.

JOHN C. BARR. In presence of T. D. MERWIN, ARTHUR P. LoTHRoP.

